When I fly drone in auto mission for mapping it takes less photo than Cam trigger message
which option I have to select do digi
We use the Sony Alpha as well.
Our missions are setup with cam_trigger_dist otherwise the missions become to large and unwieldy as we are typically doing 500-600 photos per run.
Be careful not to exceed 1.5sec between shots with the Sony.
Yes, the specs say faster shooting than this but you can get bottle necks and the camera starts buffering the shots until the buffer is full, then stalls until it writes out the buffer.
Also make sure your card is up to the task.